testing git out
test complete
This add-on module makes plotting the sensitivity and complementary sensitivity function easier (you just pass L(s) as an argument into the respective methods).

It also computes the H-infinity norms of the |T| and |S|.

It should be noted that it serves as an extension of the python control system's toolbox.
update on the add on module

The method peaks (which calculates H infinity norms for S and T given L) was kept.

New function plot_slope was added. It plots the slope of the logarithmic magnitude of a transfer function (like Skogestad 2.10).

A new method called cross_over_freq was made which does the same thing as margin but only returns the first cross over frequency. It was developed by mistake... However, it does throw an interesting exception when I try to close a figure window and this exception is partly why I didn't delete it... Do you know why it happens?
nothing major

considering putting in the default weights here for convenience
applying chapter 5.14 in general

This will entail creating a few quick graphs for SISO systems to check controllability
added the basic weight functions for painless recall
Finished the important SISO controllability rules.

This module should make analysis of a SISO system easier as
it draws all the pertinent graphs for you.
This solved example of 5.16.2 (not solved by me but by the man himself) uses the siso_controllability module to replicate the stuff he talks about in the solution.
It might clarify my questions if you look at this...
Merge pull request #41 from stelmo/master

Using Control Toolbox and some utility functions